Assisted aimer for optimized symbol scanning by a portable computing device having an integral camera

ABSTRACT

An assisted aimer for rapid, accurate, and low-cost imaging of barcodes, includes a hand-held device, such as a smart phone or tablet, having a digital camera with built-in flash, a specialized software application executing on the phone, and an aimer apparatus attached in front of the flash aperture for forming an aimer beam at a predetermined distance. The aimer beam assists a user in accurately pointing the device at a target barcode. The aimer is attachable directly to the smart phone or camera, or is made a part of an enclosure that accepts the smart phone or tablet into a self-aligning receiving space Aiming beam assistance enables the camera, its auto-focus, and the installed software application image processing to deliver rapid, snappy, barcode imaging.

CROSS REFERENCE

This application is a divisional application of U.S. Ser. No. 15/134,384, filed on Apr. 21, 2016, which is a continuation of U.S. Ser. No. 13/775,249, filed on Feb. 24, 2013, now U.S. Pat. No. 10,528,772, which claims priority of U.S. Provisional Application 61/603,228, filed Feb. 24, 2012, all of which are incorporated herein by reference in their entirety.

BACKGROUND Field

Advancements in symbol scanning assisted aimer technology and manufacturing are needed to provide improvements in cost, profitability, performance, efficiency, and utility of use.

Related Art

Unless expressly identified as being publicly or well known, mention herein of techniques and concepts, including for context, definitions, or comparison purposes, should not be construed as an admission that such techniques and concepts are previously publicly known or otherwise part of the prior art. All references cited herein (if any), including patents, patent applications, and publications, are hereby incorporated by reference in their entireties, whether specifically incorporated or not, for all purposes.

Linear barcodes have been used for many years to mark and to identify manufactured items. Barcode scanners—including hand-held devices—connected to computers running specialized scan software have traditionally been used to count such items, and are able to do so rapidly, without significant error, and are easy to use. These systems, however, are not practical in all work environments because they tend to be expensive, often require use of dedicated hardware and software, and introduce one more machines having a limited, specialized purpose into the workplace. For such applications, better, simpler solutions are being sought.

FIG. 1 illustrates a typical contemporary smart phone 100, which includes a digital camera having a camera lens 102 and a built-in flash, emitting light via a flash aperture 104. The smart phone 100 includes an operating system permitting software responsive to user input to control the digital camera and built-in flash. Specialized software applications are loadable and operable on the phone to use standard operating system interfaces to provide control of the camera and flash. Many tablet computers include a camera, with or without built-in flash.

One low-cost barcode scanner solution has been to adapt the consumer smart phone or tablet to provide barcode imaging and basic item counting (inventory) applications. A number of such barcode reading applications are currently available for popular smart phones and tablets such as those using operating systems by Google, Apple, Microsoft, and others. Many of these applications can also image the rectangular Quick Response barcodes used to link consumers to store locations and to assist in instant price comparisons.

These reader applications do not scan a barcode in the traditional sense. Instead, they use the camera to digitally photograph a printed barcode, analyze the captured barcode image, and convert the analyzed image to an internal representation. The internal representation is then used for some intended purpose, such as displaying the barcode to a user, maintaining a data file, or drive a data processing task such as item counting for inventory management (what, and how many, of each of a plurality of item types are being bought/received/incoming, in stock, or being sold/shipped/outgoing). In practice, the special functionality is limited by the speed with which the camera's autofocus is able to resolve the barcode image. Frequently imaging a single barcode can require anywhere from several seconds to a full minute—operation too slow for inventory use. Rather, these consumer applications are better suited to helping the shopper locate retail outlets and making price comparisons.

Synopsis

The invention may be implemented in numerous ways, e.g. as a process, an article of manufacture, an apparatus, a system, a composition of matter, and a computer readable medium such as a computer readable storage medium (e.g., media in an optical and/or magnetic mass storage device such as a disk, an integrated circuit having non-volatile storage such as flash storage), or a computer network wherein program instructions are sent over optical or electronic communication links. The Detailed Description provides an exposition of one or more embodiments of the invention that enable improvements in cost, profitability, performance, efficiency, and utility of use in the field identified above. The Detailed Description includes an Introduction to facilitate understanding of the remainder of the Detailed Description. The Introduction includes Example Embodiments of one or more of systems, methods, articles of manufacture, and computer readable media in accordance with concepts described herein. As is discussed in more detail in the Conclusions, the invention encompasses all possible modifications and variations within the scope of the issued claims.

The inventor recognizes that the challenge, in using a smart phone/tablet camera for item counting/inventor management applications, is two-fold. Most users want to count items rapidly, but the smart phone/tablet per se does not scan a barcode, it takes an electronic photograph of the barcode, analyzes the result, and when finally able to identify the proper item to which the printed barcode pertains, increments a specific count in a list of marked items. (The term “barcode” as used herein refers to both one-dimensional and two-dimensional optical machine-readable geometric patterns representing data.) The process of obtaining a useful image, determining to which item type the image corresponds, and finally incrementing a count for that item type is a less efficient operation than barcode scanning using dedicated application-specific hardware, and thus inherently slower. The second part of the challenge, and first recognized by the inventor, relates to a user's natural tendency to move the camera too close to the printed barcode. This mistake prevents the camera's autofocus feature from operating properly, slowing the process even more. What the user needs to do is to move the camera farther away from the printed barcode, thus allowing autofocus to operate and permitting the identification phase to proceed. The user needs some assistance in aiming the camera at a correct distance from the barcode. Unassisted, the barcode reading can require anywhere from several seconds to as much as a minute per imaged barcode. This speed is impractically too slow for other than occasional inventory taking.

The inventor is the first to recognize that what is needed is some way to help the user point the camera, hold it steady on the printed barcode, and to not crowd forward, preventing autofocus from operating properly. The embodiments presented herein provide aiming assistance for these purposes in the form of an aimer. The aimer uses the smart phone's flash illumination, controlled by a smart phone software application, to provide an aimer beam to assist in properly orienting and distancing the smart phone/tablet camera with respect to a printed barcode. (Alternatively, a separate, external light source is provided for phones having no built-in flash or a flash that is inadequate or otherwise impractical to rely upon for the aimer.) This aimer beam provides the user the assistance needed to (1) hold steady on the desired barcode, and (2) to overcome the tendency to crowd the printed barcode, thus allowing autofocus to properly function, and the software application time to do its job. The aimer is a simple device implementable using a variety of combinations of optical components (such as one or more of a lens, a prism, and/or a light slit) to form the aimer beam (such as by selective bending and/or focusing of the light from the phone's flash). The use of the aimer speeds accurate barcode reading by up to a factor of ten times, thus making possible rapid, accurate, and practical item counting for inventory and other applications. Use of the aimer accordingly dramatically improves the “snappiness” (user perceived quickness and/or efficiency) of barcode reading using a smart phone, reducing frustration and increasing acceptance.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 illustrates a portion of a standard smart phone that will be adaptable to implement an assisted aimer.

FIG. 2 is a side view of a portion of a hand-held device, such as the smart phone of FIG. 1, illustrating an attached aimer for imaging barcodes such as printed barcodes.

FIG. 3 is a pictorial view illustrating a portion of the hand-held device with attached aimer of FIG. 2 projecting an aimer beam onto a target barcode and a barcode image returned to a camera lens.

FIG. 4 is a pictorial view of a partial enclosure creating a self-aligning receiving space for a hand-held device, the partial enclosure including an optical aimer located to align with a camera lens and flash aperture of a compatible device such as the smart phone of FIG. 1.

FIG. 5 is a side view of a portion of a smart phone inserted into the receiving space of the partial enclosure of FIG. 4.

FIG. 6 is a front view illustrating an aimer that includes its own light source for use with a smart phone having a camera but no flash, the light source deriving operating power and synchronization control via a cable and mating connector attached to a system connector at the base of the phone, and the aimer including a clip mount for attachment to the smart phone.

FIG. 7 illustrates another configuration of a partial enclosure defining a self-aligning receiving space for a hand-held device in which the enclosure includes a replaceable battery and an attached aimer that includes its own light source.

FIG. 8 is a front view of a hand-held device incorporating an integral aimer for imaging barcodes such as printed barcodes.

LIST OF REFERENCE SYMBOLS IN DRAWINGS

Ref. Symbol Element Name 100 Smart Phone 102 Camera Lens 104 Flash Aperture 200 Camera with attached aimer, generally 202 Phone 204 Aimer 206 Attached to phone 208 Aimer beam 210 Returned image 300 Hand-held device with attached aimer 302 Phone 304 Attached aimer 306 Projected aimer beam 308 Barcode 310 Aimer beam on target 312 Returned barcode image 400 Partial enclosure having integrated aimer, generally 402 Partial enclosure 404 Self-aligning receiving space 406 Integrated aimer 500 Smart phone inserted into partial enclosure, generally 502 Partial enclosure 504 Integrated aimer 506 Smart phone 600 Phone and aimer, generally 602 Smart phone 604 Clip-attached aimer and external light source 606 Power and synchronization cable/connector 608 Smart phone system connector 700 Phone and enclosure, generally 702 Partial enclosure 704 Smart phone 706 Replaceable battery 708 Phone system connector 710 Attached/aligned aimer 800 Smart Phone with integral aimer, generally 802 Image Capture Aperture 804 Flash Aperture 806 Aimer Aperture 808 Illumination sub-system 810 Imaging sub-system

DETAILED DESCRIPTION

A detailed description of one or more embodiments of the invention is provided below along with accompanying figures illustrating selected details of the invention. The invention is described in connection with the embodiments. The embodiments herein are understood to be merely exemplary, the invention is expressly not limited to or by any or all of the embodiments herein, and the invention encompasses numerous alternatives, modifications, and equivalents. To avoid monotony in the exposition, a variety of word labels (including but not limited to: first, last, certain, various, further, other, particular, select, some, and notable) may be applied to separate sets of embodiments; as used herein such labels are expressly not meant to convey quality, or any form of preference or prejudice, but merely to conveniently distinguish among the separate sets. The order of some operations of disclosed processes is alterable within the scope of the invention. Wherever multiple embodiments serve to describe variations in process, method, and/or program instruction features, other embodiments are contemplated that in accordance with a predetermined or a dynamically determined criterion perform static and/or dynamic selection of one of a plurality of modes of operation corresponding respectively to a plurality of the multiple embodiments. Numerous specific details are set forth in the following description to provide a thorough understanding of the invention. The details are provided for the purpose of example and the invention may be practiced according to the claims without some or all of the details. For the purpose of clarity, technical material that is known in the technical fields related to the invention has not been described in detail so that the invention is not unnecessarily obscured.

Introduction

This introduction is included only to facilitate the more rapid understanding of the Detailed Description; the invention is not limited to the concepts presented in the introduction (including explicit examples, if any), as the paragraphs of any introduction are necessarily an abridged view of the entire subject and are not meant to be an exhaustive or restrictive description. For example, the introduction that follows provides overview information limited by space and organization to only certain embodiments. There are many other embodiments, including those to which claims will ultimately be drawn, discussed throughout the balance of the specification.

As discussed in greater detail below, an optical apparatus, referred to herein as an aimer, is removably attached (or otherwise coupled in place) to a camera-enabled smart phone/media-player/tablet/other portable/hand-held device 100 at, and in alignment with, the lens/flash aperture openings 102/104, and is illustrated in FIG. 2. (While some assisted aimer embodiments will include wireless and/or Wide Area Network capability, such capabilities are not an essential feature of the assisted aimer.) The system as a whole (smart phone and aimer) is herein called an assisted aimer. The aimer is used to project/draw/“paint” a light beam so as to form an “aiming beam” (or aiming spot/line/site/reticle, or other predetermined geometry), at a predetermined distance from the camera, on a target to be imaged. In various embodiments, the projected geometry includes, but is not limited to, one or more dots, lines, circles, scales, chevrons, more complex shapes, or a combination of these.

The assisted aimer overcomes the camera aiming problem by providing a visual indication of where in space the hand-held device's camera is currently enabled to optimally image a barcode, thereby helping the user point the camera at a barcode, hold the aim steady, and maintain a reasonable distance from the barcode, so that the camera autofocus can operate at its optimum speed. A software application installed on the phone permits the user to control the operation, initiate the aiming beam, take the photograph of the barcode, convert the photograph to a useful internal format, and use the internal format to maintain a data file. In an inventory application, the data file might represent a count of all items whose barcodes have been imaged. With these adjustments in operating procedure, the assisted aimer is able to achieve up to a 10X improvement in speed, making this low cost approach very useful for inventory taking as well as many other hand-held barcode applications.

The projected beam is used to assist a person to correctly aim and distance the camera for imaging the printed barcode, saving time and increasing the speed with which individual barcodes can be imaged. In some embodiments, the beam both assists the user and illuminates the printed barcode. In various embodiments, the beam operates with a predetermined illumination vs. time profile, e.g., at a first intensity for assisting the user to correctly aim and distance the camera and then at a second, greater intensity, synchronized with the camera, during the actual image capture. Alternatively, general diffuse illumination sufficient to provide adequate exposure for imaging the barcode area is provided, supplemented by the concentrated geometrical pattern overlay of the aimer.

In some embodiments the software takes a series of images, compiling information based on each, and does a comparative lookup based on the symbologies supported. In some embodiments, the series is concluded once the software determines that a good read of a valid barcode has been captured. At this juncture the software can provide the user with an audible sound and/or stop the scanner function. A predetermined “good read” (and/or “bad read”) audible or visual indication is optionally provided. Configurable time-outs are contemplated, to prevent the user from running down the battery trying to scan a bad or unsupported barcode. In various embodiments, the focus is varied over the series of images, in a predetermined fashion, and/or determined dynamically as a function of the images being taken.

Various configurations of the assisted aimer are contemplated including a complete system of smart phone, software application, and optical apparatus. Also contemplated is a kit for use with a pre-existing camera and including the software application and attachable optical apparatus. For use with phones having cameras but no built-in illumination, the optical apparatus includes its own source of illumination for beam projection, operated by connection with the phone at its system connector.

Other embodiments of the camera enclosures include full and partial enclosures, aimers that clip to the phone so that the aimer covers the built-in flash aperture for forming the aimer beam (in any of a variety of projected geometries, as described previously). In other embodiments the aimer is attachable to the phone using a variety of magnetic, adhesive, and permanent attachment. For embodiments including an external light source, some enclosures include replaceable batteries for powering the light source. In such battery-powered embodiments, the light is synchronized via a cable connection to the phone's system connector. In yet other embodiments, the aimer includes supplemental optics aligned with the phone's camera lens for optimizing the size of the printed barcode image.

Example Embodiments

In concluding the introduction to the detailed description, what follows is a collection of example embodiments, including at least some explicitly enumerated as “ECs” (Example Combinations), providing additional description of a variety of embodiment types in accordance with the concepts described herein; these examples are not meant to be mutually exclusive, exhaustive, or restrictive; and the invention is not limited to these example embodiments but rather encompasses all possible modifications and variations within the scope of the issued claims.

-   -   EC1) A system comprising:     -   a hand-held device enabled to support general purpose mobile         applications and having a built-in digital camera enabled to         support general purpose digital photography;     -   a light source synchronized with the digital camera;     -   a barcode software application for controlling the digital         camera and synchronizing the light source to capture an image of         a printed barcode, to convert the captured barcode image to an         internal form, and to use the internal form for maintaining a         data file;     -   an aimer enabled to project an aiming beam at a predetermined         distance; and     -   user controls for initiating beam formation, barcode image         capture, image conversion, and file maintenance.     -   EC2) The system of EC1, wherein the aimer comprises at least one         of an arrangement of lenses, prism, and beam forming aperture.     -   EC3) The system of EC1, wherein the maintained data file         comprises an inventory of barcode imaged items and quantities of         each, and data file maintenance comprises at least maintaining a         correct count of each of the imaged items.     -   EC4) The system of EC1, wherein the synchronized light source is         provided via a flash aperture of a flash built-in to the         hand-held device, the barcode software application is executed         on the hand-held device, and the user controls are at least in         part implemented by the hand-held device.     -   EC5) The system of EC4, wherein the hand-held device is one of a         smart phone or a tablet.     -   EC6) The system of EC4, wherein the barcode related         functionality is a latent feature of the system, the feature is         enabled by the presence of the barcode software application and         the aimer, and at least one of the barcode software application         and the aimer are enabled to be provided as a subsequent field         upgrade with respect to an earlier deployment of the system.     -   EC7) The system of EC4, wherein the aimer is attached to the         hand-held device at the flash aperture, and is aligned to enable         formation of the aiming beam from light emitted at the flash         aperture by the synchronized light source.     -   EC8) The system of EC7, further comprising the aimer being         attached to the hand-held device by one of a magnetic temporary         attachment, an adhesive temporary attachment, and a permanent         attachment.     -   EC9) The system of EC4, further comprising enclosure means         enabled to receive the aimer as an attachment and further         enabled to receive the hand-held device such that the aimer is         aligned to produce the aiming beam from light emitted at the         flash aperture by the synchronized light source.     -   EC10) The system of EC9, wherein the enclosure further comprises         one of a partial enclosure of the hand-held device, a full         enclosure of the hand-held device, and a clip enclosure for a         temporary attachment and alignment of the aimer only.     -   EC11) The system of EC1, wherein the aimer further comprises         means for optimizing a size of a printed barcode image for the         camera.     -   EC12) The system of EC11, wherein the size optimizing means         further comprises a lens arrangement, such as a         low-magnification telephoto lens, for increasing the size of the         barcode image.     -   EC13) The system of EC11, wherein the hand-held device is         flashless, the barcode software application is executed on the         hand-held device, and the user controls are at least in part         implemented by the hand-held device.     -   EC14) The system of EC13, wherein the aimer further comprises         the synchronized light source and optimized barcode imaging         lens, the aimer forms the aimer beam using light emitted by the         light source, the aimer is attached to the hand-held device at a         camera lens of the built-in digital camera, and the aimer is         aligned to enable the optimized barcode imaging lens to optimize         a size of the barcode image for the camera     -   EC15) The system of EC14, further comprising the aimer being         attached to the hand-held device by one of a magnetic temporary         attachment, an adhesive temporary attachment, and a permanent         attachment.     -   EC16) The system of EC14, further comprising the synchronized         light source being connected with, and synchronized by, the         hand-held device via a cable and connector attached to a mating         system interface connector of the hand-held device.     -   EC17) The system of EC16, wherein the synchronized light source         derives operating power via the cable and connector from the         hand-held device.     -   EC18) The system of EC16, further comprising a replaceable         battery for providing operating power to the synchronized light         source.     -   EC19) The system of EC14, further comprising enclosure means         enabled to receive the aimer as an attachment and further         enabled to receive the hand-held device such that the camera         lens is aligned to optimize barcode image size.     -   EC20) The system of EC19, wherein the enclosure further         comprises one of a partial enclosure of the hand-held device, a         full enclosure of the hand-held device, and a clip enclosure for         a temporary attachment and alignment of the aimer only.     -   EC21) An aimer kit for use with a hand-held device such as a         smart-phone, the hand-held device having a camera with flash,         the kit comprising:     -   an aimer adapted for attachment to the hand-held device at         camera lens and flash apertures for optimizing a camera image         and for forming a beam at a predetermined distance using light         emitted by the flash; and     -   a software application for use on the hand-held device, the         application being responsive to user input for using the camera,         flash, and aimer to form the aiming beam, to capture an image of         a printed barcode, to convert the barcode to an internal format,         and to use the internal format for maintaining a data file.     -   EC22) The aimer kit of EC21, further comprising the aimer being         adapted for attachment to the hand-held device and aligned with         a camera lens and a flash aperture.     -   EC23) The aimer kit of EC22, further comprising the aimer being         attached to the hand-held device by one of a magnetic temporary         attachment, an adhesive temporary attachment, and a permanent         attachment.     -   EC24) The aimer kit of EC22, further comprising enclosure means         with attached aimer for receiving the hand-held device such that         the camera lens and flash aperture are aligned to optimize         barcode image size and to produce the aiming beam.     -   EC25) The aimer kit of EC24, wherein the enclosure further         comprises one of a partial enclosure of the hand-held device, a         full enclosure of the hand-held device, and a clip enclosure for         a temporary attachment and alignment of the aimer only.     -   EC26) An aimer kit for use with a hand-held device such as a         smart-phone or tablet, the hand-held device having a camera         without flash, the kit comprising:     -   an aimer including a synchronized light source, and adapted for         attachment to the hand-held device at camera lens for optimizing         a camera image and for forming an aiming beam at a predetermined         distance using light emitted by the synchronized light source;         and     -   a software application for use on the hand-held device, the         application being responsive to user input for using the camera         and synchronized light source to form the aiming beam, to         capture an image of a printed barcode, to convert the image to         an internal format, and to use the internal format for         maintaining a data file.     -   EC27) The aimer kit of EC26, further comprising the aimer being         adapted for attachment to the hand-held device, aligned with a         camera lens, and producing the aiming beam.     -   EC28) The aimer kit of EC27, further comprising the aimer being         attached to the hand-held device by one of a magnetic temporary         attachment, an adhesive temporary attachment, and a permanent         attachment.     -   EC29) The aimer kit of EC27, further comprising enclosure means         with attached aimer for receiving the hand-held device such that         the camera lens is aligned to optimize barcode image size and to         produce the aiming beam.     -   EC30) The aimer kit of EC29, wherein the enclosure further         comprises one of a partial enclosure of the hand-held device, a         full enclosure of the hand-held device, and a clip enclosure for         a temporary attachment and alignment of the aimer only.     -   EC31) The aimer kit of EC29, further comprising the synchronized         light source being connected with, and synchronized by, the         hand-held device via a cable and connector attached to a mating         system interface connector of the hand-held device.     -   EC32) The aimer kit of EC29, wherein the synchronized light         source derives operating power via the cable and connector from         the hand-held device.     -   EC33) The aimer kit of EC29, further comprising a replaceable         battery for providing operating power to the synchronized light         source.     -   EC34) The system of EC1, wherein the beam is a horizontal beam.     -   EC35) The system of EC1, wherein the beam is formed at a         predetermined distance.     -   EC36) The system of EC1, wherein the beam forming aperture is a         beam forming slit.

Assisted Aimer—Sleeveless Embodiments

FIG. 2 is a side view of a hand-held device, such as the smart phone of FIG. 1, illustrating an attached aimer for imaging printed barcodes such as barcodes. The phone and attached aimer are indicated generally by the reference numeral 200 and illustrated aspects of this embodiment include a phone 202, an aimer 204 (an optical apparatus for generating an aiming beam), attachment 206 to phone, a flash-derived aimer beam 208, and image 210 returned to camera lens. While illustrated using a smart phone, it is contemplated that the techniques herein are equally applicable to other portable computing devices having integrated camera functionality (including, but not limited to laptops and tablets).

According to embodiment, aimer beam formation is achieved in several ways including use of one or more focusing lens, mirror, light slit, prism, diffuser, or a combination of these. E.g., an aiming spot at the center of a target can be generated by a single LED on-axis with a single focusing lens (or mirror). Diffusers can also be used with LEDs to form soft-focus patterns. Light from the phone's flash passes through the attached aimer, which can be aligned/rotated relative to the flash aperture, to orient the resulting beam emerging from the aimer as desired. Various techniques are contemplated for attachment of the aimer directly to the phone, including slip-on, clip-on, snap-on, glue-on, and magnetic attachment, among others.

In some embodiments, the optics comprised in aimer 204 include not only optics for forming the aimer beam, but also optics for altering the image recorded by the camera. E.g., aimer 204 may also include optics for optimizing the captured barcode images. In such embodiments, the aimer is aligned with the flash while the optimizing optics are aligned with the camera. In some embodiments, the aimer may be field configurable with or without particular optics (according to embodiment including, but not limited to, “macro lens”, or telephoto, functionality) in the imaging path.

FIG. 3 is a pictorial view illustrating the hand-held device with attached aimer of FIG. 2 projecting an aimer beam onto a target barcode and a barcode image returned to a camera lens. These details are indicated generally by reference numeral 300 and include a phone 302 with an attached aimer 304, an aimer beam 306 (projecting outward from the aimer in a manner not necessarily noticeable to the user while “in flight”, illustrated here using dashed lines), a target barcode 308, the aimer beam 310 projected noticeably on the target barcode, and a returned barcode image 312.

Light emitted by built-in flash on phone 302 passes through attached aimer 304 and emerges as projected aimer beam 306 (dashed lines). In this illustrative embodiment, the projected beam intersects with barcode 308 as a horizontal line 310 extending from one end of barcode 308 to the other end. The barcode image 312 is returned to the camera lens and is digitally imaged by camera 302 under control of the specialized software application. Having the length of the horizontal line 310 approximate the horizontal length of the barcode 308 helps the user point the camera 302 directly at the barcode. If the user allows the beam to drift up, down, or to one side or the other, he is able to correct his aim so that the camera can acquire the barcode. Having the length of the horizontal line 310 approximate the horizontal length of the barcode when the camera is held at an approximate optimum distance from the barcode also helps the user hold the camera at the approximate optimum distance from the barcode, e.g., 1-2 feet, permitting the camera autofocus to operate at its optimum speed. If he holds the camera too close to the barcode, the length of the line 310 will not extend to the ends of the barcode 308. If he holds the camera too far from the barcode, the length of the line 310 will extend beyond the ends of the barcode.

While FIG. 3 shows an aimer beam enabled to project a horizontal line, other projection geometries (light beam patterns) are contemplated. These projection geometries may include one or more dots/spots, circles, concentric circles, lines, chevrons, rectangles, other polygons, combinations of the foregoing (such as various “crosshairs”), and segmented/dashed/dotted versions of these (e.g., square corners). The degree to which these geometries are focused (from sharp focus to diffuse) will vary by embodiment. As with the use of a horizontal aimer beam described previously, in some embodiments the horizontal extent of the projection geometries are enabled to generally match the horizontal length of the barcode when the camera is held at an approximate optimum distance.

In some embodiments, the aimer is not directly attached to the phone. Instead, the phone is inserted into a self-aligning receiving space of a partial enclosure and the aimer is attached to the partial enclosure. Once inserted, the camera lens (102 of FIG. 1) and flash aperture (104 of FIG. 1) are maintained in a proper alignment with the attached aimer for producing the aimer beam during use (in any of a variety of projected geometries, as described previously). Several representative enclosures incorporating an aimer are illustrated in FIGS. 4-7.

Assisted Aimer—Sleeve Embodiments

FIG. 4 is a pictorial view of a partial enclosure creating a self-aligning receiving space for a hand-held device, the partial enclosure including an optical aimer located to align with a camera lens and flash aperture of a compatible hand-held device such as the smart phone of FIG. 1. The partial enclosure is indicated generally by the reference numeral 400 and includes partial enclosure 402, self-aligning receiving space 404, and integrated aimer 406.

Partial enclosure 402 creates a space 404 for receiving an upper end of a smart phone, such as smart phone 100, illustrated in FIG. 1. Camera lens 102 and flash aperture 104 of smart phone 100 are located in an upper corner of the side normally facing away from a user. Attached aimer 406 is placed in a corresponding upper corner of partial enclosure 402, which is open at its bottom side for receiving an upper half of the smart phone 100. When a phone is fully inserted into the self-aligning receiving space 404, the phone's camera lens 102 and flash aperture 104 are aligned with the aimer, permitting the aimer to receive light emitted from flash aperture 104, form the received light into an aimer beam and bring the beam to a focus at a predetermined distance, typically 1-2 feet. These details are illustrated in FIG. 5.

FIG. 5 is a side view of a smart phone inserted into the self-aligning receiving space 404 of the partial enclosure of FIG. 4. The details are indicated generally by reference numeral 500 and include partial enclosure 502 having an integrated aimer 504, and smart phone 506 inserted through the open bottom into the self-aligning receiving space (404 of FIG. 4). When the phone is fully inserted, the phone's camera lens and flash aperture are properly aligned with the optical elements of integrated aimer 504. The word “integrated” signifying that the aimer and partial enclosure 502 can be manipulated as a combined unit. In some embodiments the integrated aimer 504 is permanently attached to partial enclosure 502, in other embodiments it is removably attached to same.

When a hand-held device, such as a smart phone, has a digital camera but does not include built-in flash, or for various reasons it is determined to either not rely on or to augment a built-in flash, an external light source, synchronized and controllable by the smart phone software application can be provided. FIGS. 6 and 7 illustrate aimers that provide such light sources.

According to embodiment, aimer components include combinations of one or more focusing lens, mirror, light slit, prism, diffuser, LED, laser diode, electromechanical drive (for oscillating one or more components, such as a lens or mirror), and Diffractive Optical Element (DOE). E.g., a lens with two off-axis LEDs can be used to generate spots on respective ends of a target. A single LED used with an oscillating lens can create an aiming line. DOEs or diffusers can be used with laser diodes to form focused patterns in arbitrary shapes. So long as consistent with implementation via a sleeve, sleeved embodiments may also implement any of the other features discussed in the various sleeveless embodiments.

FIG. 6 is a front view illustrating an aimer that includes its own light source for use with a smart phone (such as one having a camera but no flash), the light source deriving operating power and synchronization control via a cable and mating connector attached to a system connector at the base of the phone, and the aimer including a clip mount for attachment to the smart phone.

The phone and aimer are indicated generally by reference numeral 600 and include a smart phone 602, a clip-attached external combination aimer and light source 604, a power and synchronization cable 606, connecting the external light source to smart phone system connector 608. Details of the connection to a specific model of a smart phone will depend upon the phone's manufacturer. The connection illustrated is typical of connection via a system connector of the Apple iPhone series of smart phones, enabling the smart phone to charge and transfer data (such as for updates).

During use, aimer/light source 604 is clipped onto smart phone 602 such that the phone camera lens is aligned with any image-enhancement optics made part of the aimer, and such that the aimer beam is aligned to coincide with the long axis of barcodes to be scanned, typically in a horizontal direction. The external light source in the aimer derives operating power from the smart phone battery via connector 608. A software application installed and operable on the smart phone controls the external light via a programming interface, and according to embodiment provides user controls via the phone's user interfaces, such as by (re-) programming the function of physical controls (such as physical buttons), or by implementing virtual controls (such as buttons, sliders, knobs, or data entry fields) on a touch-screen of the phone, the virtual controls being implemented via one or more screens and/or menus). Smartphone operating systems generally comprise one or more Application Programming Interfaces (APIs) for separate programmatic control of the flash and camera. Via these API, the assisted aimer software is able to provide a wide range of functionality, according to embodiment, including basic synchronization of the flash with camera image capture, and implementation of illumination vs. time profiles as discussed elsewhere herein.

In a typical application, the software application (e.g., as supplied and/or stored on a tangible or non-transitory computer medium, such as software stored on optical, magnetic, or solid-state media), aimer 604, including cable 606 and mating connector for connection via phone system connector 608, are sold as a kit for use with smart phone 602. In specific embodiments, external electrical circuits required for use by a particular smart phone model are incorporated into aimer 604. In other specific embodiments, attachment and alignment of aimer 604 to phone 602 is achieved as part of a partial enclosure, such as that illustrated in FIGS. 4, 5, or by means of magnetic, temporary adhesive, or permanent gluing as discussed with respect to FIG. 2. Other means of attachment/alignment are also contemplated.

FIG. 7 illustrates another configuration of a partial enclosure defining a receiving space for a hand-held device in which the enclosure includes a replaceable battery and an attached aimer that includes its own light source. Phone and enclosure details are indicated generally by reference numeral 700 and include partial enclosure 702, enclosing smart phone 704, and providing a replaceable battery 706 supplying supplemental operating power to phone via phone system connector 708 (having functionality as described previously for system connector 608 of FIG. 6), and to attached/aligned aimer 710 including aimer beam forming optical elements and optional image-enhancement optical elements (not separately illustrated). According to embodiment, the aimer beam is formed in any of a variety of projected geometries, as described previously. Attached/aligned aimer 710 derives operating power from replaceable battery 706, and obtains synchronization with phone camera via the phone system connector 708. In some embodiments, the replaceable battery 706 provides supplemental operating power to smart phone 704, at least during “scanning” (barcode imaging and processing). In some embodiments, the replaceable battery 706 is provided by a combination of standard, commercially available, off-the-shelf batteries.

FIG. 8 is a front view of a hand-held device, incorporating an integral aimer for imaging printed barcodes such as barcodes, and otherwise having the features associated with a smart phone (or tablet). Illustrated aspects of this embodiment include smart phone 800, modular imaging sub-system 810, modular illumination sub-system 808, image capture aperture 802, flash aperture 804, and aimer aperture 806. According to embodiment, imaging sub-system 810 is a build-option module or a standard component of smart phone 800. Imaging sub-system 810 comprises an image capture sub-system, of which image capture aperture 802 is the principal user-visible component. According to embodiment, image capture aperture 802 comprises a conventional camera lens assembly for digital photography and/or further optical components (as discussed previously) supporting enhanced imaging for barcodes. According to embodiment, illumination sub-system 808 is a build-option module or a standard component of imaging sub-system 810. According to embodiment, illumination sub-system 808 comprises flash aperture 804 and/or aimer aperture 806. According to embodiment, aimer aperture 806 comprises a conventional illumination source for digital photography and/or further optical components (as discussed previously) enabling projection of an aiming beam (implementing any of the varieties of aiming beam geometries discussed previously). Opening or “giving focus” to a digital photography application configures and uses the various described components of the imaging sub-system 810 in a manner optimal for digital photography. Opening or giving focus to a barcode “scanning” application configures and uses the various described components of the imaging sub-system 810 in a manner optimal for imaging barcodes, as discussed throughout.

CONCLUSION

Certain choices have been made in the description merely for convenience in preparing the text and drawings and unless there is an indication to the contrary the choices should not be construed per se as conveying additional information regarding structure or operation of the embodiments described. Examples of the choices include: the particular organization or assignment of the designations used for the figure numbering and the particular organization or assignment of the element identifiers (the callouts or numerical designators, e.g.) used to identify and reference the features and elements of the embodiments.

The words “includes” or “including” are specifically intended to be construed as abstractions describing logical sets of open-ended scope and are not meant to convey physical containment unless explicitly followed by the word “within.”

Although the foregoing embodiments have been described in some detail for purposes of clarity of description and understanding, the invention is not limited to the details provided. There are many embodiments of the invention. The disclosed embodiments are exemplary and not restrictive.

It will be understood that many variations in construction, arrangement, and use are possible consistent with the description, and are within the scope of the claims of the issued patent. For example, interconnect and function-unit bit-widths, clock speeds, and the type of technology used are variable according to various embodiments in each component block. The names given to interconnect and logic are merely exemplary, and should not be construed as limiting the concepts described. The order and arrangement of flowchart and flow diagram process, action, and function elements are variable according to various embodiments. Also, unless specifically stated to the contrary, value ranges specified, maximum and minimum values used, or other particular specifications (such as flash memory technology types; and the number of entries or stages in registers and buffers), are merely those of the described embodiments, are expected to track improvements and changes in implementation technology, and should not be construed as limitations.

Functionally equivalent techniques known in the art are employable instead of those described to implement various components, sub-systems, operations, functions, routines, sub-routines, in-line routines, procedures, macros, or portions thereof. It is also understood that many functional aspects of embodiments are realizable selectively in either hardware (i.e., generally dedicated circuitry) or software (i.e., via some manner of programmed controller or processor), as a function of embodiment dependent design constraints and technology trends of faster processing (facilitating migration of functions previously in hardware into software) and higher integration density (facilitating migration of functions previously in software into hardware). Specific variations in various embodiments include, but are not limited to: differences in partitioning; different form factors and configurations; use of different operating systems and other system software; use of different interface standards, network protocols, or communication links; and other variations to be expected when implementing the concepts described herein in accordance with the unique engineering and business constraints of a particular application.

The embodiments have been described with detail and environmental context well beyond that required for a minimal implementation of many aspects of the embodiments described. Those of ordinary skill in the art will recognize that some embodiments omit disclosed components or features without altering the basic cooperation among the remaining elements. It is thus understood that much of the details disclosed are not required to implement various aspects of the embodiments described. To the extent that the remaining elements are distinguishable from the prior art, components and features that are omitted are not limiting on the concepts described herein.

All such variations in design are insubstantial changes over the teachings conveyed by the described embodiments. It is also understood that the embodiments described herein have broad applicability to other computing and networking applications, and are not limited to the particular application or industry of the described embodiments. The invention is thus to be construed as including all possible modifications and variations encompassed within the scope of the claims of the issued patent. 

What is claimed:
 1. An apparatus comprising: an optical beam transformer; a mechanical coupler to couple the optical beam transformer to a smart phone; wherein the smart phone is a standard smart phone not having any barcode imaging application-specific hardware, is enabled to support general purpose mobile applications, and has a built-in flash and a built-in digital camera enabled to support general purpose photography; wherein the smart phone is enabled to execute a barcode software application to control the built-in flash, to control the built-in digital camera to capture an image of a barcode, to convert the captured barcode image to an internal form, and to store the internal form in a data file; wherein the mechanical coupler has at least one surface shaped to be compatible with removable attachment of the apparatus to an external surface of the smart phone and is formed to retain the optical beam transformer in alignment with an aperture of the built-in flash; wherein the optical beam transformer has an optical input to receive light from the built-in flash aperture and an optical output to provide a transformation of the received light into an aiming pattern, the aiming pattern enabling a user to distance the smart phone in accordance with optimum speed focusing of the built-in digital camera; and wherein the aiming pattern assisted distancing enables the user to more rapidly process the barcode than possible with the smart phone alone.
 2. The apparatus of claim 1, wherein the removable attachment is via at least one of slip-on, clip-on, snap-on, glue-on, and magnetic attachment.
 3. The apparatus of claim 1, wherein a dimension of the aiming pattern approximates a dimension of the barcode.
 4. The apparatus of claim 1, wherein the optical beam transformer comprises at least one of a focusing lens, an arrangement of lenses, a mirror, a prism, a beam forming aperture, and a diffuser.
 5. The apparatus of claim 1, wherein the aiming pattern comprises one or more dots, spots, circles, concentric circles, lines, chevrons, and rectangles.
 6. An apparatus comprising: an optical beam transformer; a mechanical coupler to couple the optical beam transformer to a removable enclosure usable to enclose a smart phone; wherein the smart phone is a standard smart phone not having any barcode imaging application-specific hardware, is enabled to support general purpose mobile applications, and has a built-in flash and a built-in digital camera enabled to support general purpose photography; wherein the smart phone is enabled to execute a barcode software application to control the built-in flash, to control the built-in digital camera to capture an image of a barcode, to convert the captured barcode image to an internal form, and to store the internal form in a data file; wherein the mechanical coupler has at least one surface shaped to be compatible with removable attachment of the apparatus to an external surface of the removable enclosure and is formed to retain the optical beam transformer in alignment with an aperture of the built-in flash when the smart phone is inserted in the removable enclosure; wherein the optical beam transformer has an optical input to receive light from the built-in flash aperture and an optical output to provide a transformation of the received light into an aiming pattern, the aiming pattern enabling a user to distance the smart phone in accordance with optimum speed focusing of the built-in digital camera; and wherein the aiming pattern assisted distancing enables the user to more rapidly process the barcode than possible with the smart phone alone.
 7. The apparatus of claim 6, wherein the removable attachment is via at least one of slip-on, clip-on, snap-on, glue-on, and magnetic attachment.
 8. The apparatus of claim 6, wherein the removable enclosure is one of a partial enclosure, a full enclosure, and a clip enclosure.
 9. The apparatus of claim 6, wherein a dimension of the aiming pattern approximates a dimension of the barcode.
 10. The apparatus of claim 6, wherein the optical beam transformer comprises at least one of a focusing lens, an arrangement of lenses, a mirror, a prism, a beam forming aperture, and a diffuser.
 11. The apparatus of claim 6, wherein the aiming pattern comprises one or more dots, spots, circles, concentric circles, lines, chevrons, and rectangles. 